Royals Super-Fit Pippa Middleton Takes Her Giant Ring Out for Jog (Of Course She Does!) Pippa's unique ring is the perfect accessory for the sports fanatic By Erin Hill Erin Hill Twitter Senior News Editor, PEOPLE People Editorial Guidelines Published on July 20, 2016 02:30 PM Share Tweet Pin Email Photo: James Jenkins/Splash News Online Pippa Middleton is already proving that her new engagement ring is the perfect choice for a girl on the go! • Want to keep up with the latest royals coverage? Click here to subscribe to the Royals Newsletter. Dressed in a white tank top and pink running shorts, the super-fit bride-to-be, who announced her engagement to financier James Matthews on Tuesday, was spotted out for a run in London Wednesday – with her huge ring leading the way. “It’s hugely practical, because it’s quite flat and it will be very easy for her to wear,” says jeweler Annoushka Ducas, whose eponymous boutique off the King’s Road has been a go-to choice of Pippa, her sister Princess Kate and their mom Carole for years. “It’s a very timeless piece that will look as good now as it will in 50 years time. It’s bezel fit making it a bit more modern, which fits in very well with her style.” Set in white gold or platinum with an Asscher-cut diamond at least three carats in size, the Art Deco design is the perfect accessory for the sports fanatic. Since it features a more secure setting (rather than a traditional arrangement), it’s ideal for the active royal sister. 5 Things to Know About Pippa’s Fianc James Matthews! From running marathons in Kenya to 54-mile bike races and death-defying downhill ski competitions, the adrenaline junkie is always on the move. And her stunning sparkler will be along for the ride!